Radioactive elements can be categorised into (a) Neutron rich nuclide (b) Neutron poor nuclide In order to achieve stable n/p ratio these nuclide either emits beta^(-),beta^(+) (positron) or alpha-particle depending upon the n/p ratio of unstable nuclei and stable nuclei ._(53)P^(135) rarr Q+a Q rarr R+b [Note : only stable isotope of element P and Q are ._(53)P^(135) and ._(54)Q^(137) respectively] Element P,Q,R do not show any resemblence to currently known element Particles a and b can be respectively

Radioactive elements can be categorised into (a) Neutron rich nuclide

1.	Radioactive elements can be categorised into (a) Neutron rich nuclide (b) Neutron poor nuclide In order to achieve stable n/p ratio these nuclide either emits beta^(-),beta^(+) (positron) or alpha-particle depending upon the n/p ratio of unstable nuclei and stable nuclei ._(53)P^(135) rarr Q+a Q rarr R+b [Note : only stable isotope of element P and Q are ._(53)P^(135) and ._(54)Q^(137) respectively] Element P,Q,R do not show any resemblence to currently known element Particles a and b can be respectively
Answer» `._(2)He^(4),-1^(E^(o))` `.-1^(e^(o)),._(2)He^(4)` `.-1^(e^(o)),._(+)e^(o)` `._(2)He^(4),._(2)He^(4)` ANSWER :B::C